dsh-plugin-width-slider: DSH Integrated UI Enhancement Plugin

The DSH plugin `dsh-plugin-width-slider`, maintained by djs326, is designed to address gaps in the interaction experience of the official client. It consolidates core features such as conversation width adjustment, forced Simplified Chinese output, settings panel patches, session deletion, and workspace pagination. The plugin supports a width slider and a “follow window” mode, enhances the expansion of thinking blocks and language control, and transforms the sidebar into a tab bar. Installation requires running the corresponding command in the terminal and restarting DSH. Note that this plugin integrates upstream features and supports only Windows and DSH versions 0.1.5-rc.1 or later.